Power-transmission device.



Patented Apr. 8,1919.

. R 0 M v 0 5 R. ww m m m J H 6 m 2 W M20 1 w d 2 m H 0 "H |l C. N.HUDSON.

APPLICATION FILED SEPT. I4. 1918.

"aims PCH' s POWER TRANSMISSION DEVICE.

[h I I m LII To all whom it may concern:

Be it known that-I, CHARLES" N. a citizen of the United States, residingat seamenthe county of King and State of Washington, have, inventeda'certain new and useful Improvement in Bowen-Trans mission Devices, ofwhlch thefollowlng'isa specification.

My invention relates to improvements'in power transmission devices andthe object of my invention is to rovide a friction dev ce of a'silnpleand efiicient form ofconstru'ction that is adaptedfor establishing adriv ing connection between" two; adjacent drums or disks. a

A further object of my invention is toprovide suitable means for1contro1lingthe operation of the friction members.

"My invention consists-in the novel con-- structioi of powertransmission devices and j a in the novel method of controlling theoperation of such devices as will be more clearly hereinafter described andclaimed;

In the accompanying drawings Figure 1,

is va view in side elevation of a transmission device constructed inaccordance with my invention; h v

'Figx2'is a plan view'of the same'fand "f Fig. 3 is a somewhatdiagrammatic view in side elevation illustrating a simple form of myinvention.

Referring to the drawings, throughout which like" reference numeralsindicate like parts, the numerals 5 and 6 designate two large drums orrollers that are provided with axial pivots 7 and 8 respectively whichare journaled in bearings 91 that are secured to a rectangular frame 10by bolts 11 in such a manner that the peripheral portions of the drumsare spaced a short distance from each other at their closest point whichwill beon a plane passing through the centers of the two drums. L

Operatively disposed between the two drums 5a'nd' 6 at points aboveandbelow a plane passing through the centers of the drums are tworollers 12 and 13 that are each of a diameter not to exceed one fourthof the diameter of the drums and that engage with the peripheralportions thereof to transmit rotary motion from one'to the other of thedrums.

The roller 12 is provided on itsends with axial pivots 14 that arejournaled in the lower portions of "links 15 and 16 that pass HUDsoN,

' fixed i the sides ofthe" block 17 into slots 21 in'guide members 22that are pivots '27 to liit't-the roller 12 out of i Specification of-Letters' liatent, v f Pate t d Ap 8 1919? "iApplication ffledSeptember 14,1918; seriainag w p. a i

upwirdly through a block 17 and are adjustably -secured thereto by nuts18. j

frame-10 and is provided near each end with.

pins 20 that project outwardly from I V ,fiXedly secured to the frame 10andproject upwardly therefrom.

Both ends of the block" '17 are connected by p1vots23 with the top endsof links 24:. The bottom ends of the links 24 are con- 'Iiected bypivots 25 with the inner ends of lever arms 26 that are fulcrumedon'pivots' 27 and articulated at their outer, ends with operating links'28 by means of which the" lever arms maybe oscillated on the fulcrum 1a a a n a ment with'thedrumsb and 6: f

The lowerroller 13 is provided on both ends withaxial pivot pins 30 thatare journaled in the lowerends' of links 3Ithat are tions'off lever arms33. The'jleverlarms '33 plvotally secured to the lever arms 26 so thatwhen the outer ends of the lever arms 26 are 'r'aised' the roller 13will be lifted into engagement with the drums 5 and 6. c

When the. device isin use one ofthe drums is necessarily connected witha source of power bywhich it may be driven and the outer drum is drivenbyipower communicated to it from the first drum throughthe I rollers 12and '13.

I If the drum 5is driven in a clockwise diarticulated by pivots 32with-the medial 'por rection as indicated by the arrow A andvthe j"rollers'12 and 13 are held firmly in engagement with'the drums 12fand'13 by exerting a lift on'the end of the lever arm 26 then therollers12 and 13 will'be rotated in a co'ntration.

drive the opposite drum, the direction of roclockwise direction'and thedrum 6 will be driven by such rollers in a -clockwise direc- The toproller 12 maybe adjusted by turn- I ing the nuts 18 sothat the rollers12 and 13 1 I 100 'If the drum 5 is. driven in acontra-clockwisedirection or if the drum dis driven in L either direction itis obviousthat the rollers 1 12 and 13 will operate in the same manner to willengage the drums 5 and 6 with equal a It has been found-byexperimentthat my transmission will not operate successfully if the diameter ofthe roller ismore than onefourth of the diameter of the driving drum.

Mydevice is especially well adapted for driving drums whereon cable maybe wound the rollers of which being disposed so that they willvengagewith the end flanges of the drums. j

Fig.3 illustrates a simple form of transmission; of this type whichconsists of two rollers40 and 41 that may be mounted for rotation,adjacent each other on pivots 42 and 43 and are adapted to have a looseroller 44 dropped between them to form a frictional driving member asshown.

When the drum 40 is driven in a clockwisedirection the roller 44 anddrum41 will be driven in the directions indicated by the arrows.

The diameter of the roller 44will neces sarily not be greater than onefourth of the diameter of the driving drum 40 regardless of the diameterof the driven drum.

If the drum is driven in a contra-clockwise direction the device shownin Fig. 3 will be inoperative to drive the drum 41 owing tothe fact thatthe roller 44 is not held in position except by gravity.

Itw-ill be. readily seen that by a simple duplication of parts anynumber of drums may be driven,

It is'obvious that changes in the form-of copies of this patent may beobtained for construction of the various parts of the power transmissionherein shown may be resorted to within the scope of the following claim.

What I claim is:

A device of the class described, comprising a frame, two drums rotatablymounted therein in side by side relation the peripheral portions ofsaiddrums being spaced apart, a roller adapted to be inserted between saiddrums on the top sides thereof, a member extending crosswise of saidframe above said roller, means adjustably secured to said member forsupporting said roller for rotation, devices supporting said member forvertical movement with respect to said frame, links pivotally connectedwith the outer ends of said member, lever arms fulcrumed on said frameand articulated with the lower ends of said links, means forraising andlowering the outer ends of said lever arms, another roller adapted to beinserted between said drums on the bottom side thereof, other lever armspivotally secured at the inner end of said frame, links connecting theouter ends of said other lever arms to said first named lever arms, andlinks connecting said last named roller with the medial portions of saidlast named lever arms whereby said first named roller and said lastnamed roller may be moved into and out of engagement with said drumssimultaneously.

In witness whereof, I hereunto subscribe my name this 7th day ofSeptember, A. D.

1918. CHARLES N. HUDSON.

five cents each, by addressing the Commissioner of Patents, Washington,I). G."

